Should this script be working?

What I mean is, do I need to do something more because of the ajax or should it just work? This is in my functions.php for the theme but as far as I can tell, it’s being ignored as is. Am I missing something?

add_action( 'admin_head', 'ajax_action_stuff' );
function ajax_action_stuff() { ?>
	<script type="text/javascript">
	$('#pnd_title_url').blur(function() {
		$.ajax({url: $(this).val(),
		beforeSend: function() {jQuery("#loading").show("slow");},
		complete: function() { jQuery("#loading").hide("fast");},
		success: function(data, textStatus) {jQuery("#verified").show("slow");},
		error: function(jqXHR, textStatus, errorThrown) {jQuery("#problem").show("slow");});
	});
	</script> <?php

I would greatly appreciate any help… thanks!